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trap_gcc.S

trap_gcc.S 358 B
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  1. #include "cpuport.h"
    2. 

  2. 

  3. 	.globl rt_hw_do_after_save_above
    4. 

  4. 	.type rt_hw_do_after_save_above,@function
    5. 

  5. rt_hw_do_after_save_above:
    6. 

  6. 	addi  sp, sp,  -4
    7. 

  7.     STORE ra,  0 * REGBYTES(sp)
    8. 

  8.     csrr  a0, mcause
    9. 

  9.     csrr  a1, mepc
    10. 

  10.     mv    a2, sp
    11. 

  11.     csrrw ra, 0x07ED, ra
    12. 

  12. 

  13. 	li   t0,    0x08
    14. 

  14. 	csrc mstatus, t0
    15. 

  15. 

  16.     LOAD  ra,  0 * REGBYTES(sp)
    17. 

  17.     addi  sp, sp,  4
    18. 

  18.     ret
    19.